This is a Lunsford "Super Duty Plus" Titanium Turnbuckle Kit, with included Ball Cups and Hinge Pins. These are intended for use with the Associated T4.2. These turnbuckles are CNC machined and thread rolled in house from domestic US 6AL/4V grade titanium. If you want to put your car on a diet, this is one of the best places to start eliminating weight, without sacrificing strength. Get the strongest combination of all time with these titanium turnbuckles, and precision molded ball cups from Lunsford.